A DFIG-based wind energy conversion system (WECS) for LVRT enhancement using a hybrid approach: an efficient MEHRFA tech
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METHODOLOGIES AND APPLICATION
A DFIG-based wind energy conversion system (WECS) for LVRT enhancement using a hybrid approach: an efficient MEHRFA technique G. Manohar1 • S. Venkateshwarlu1 • A. Jaya Laxmi2
Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract This paper proposes a hybrid algorithm-based control model for enhancing the low voltage ride through (LVRT) capability of the doubly fed induction generator (DFIG) system. The hybrid algorithm is the combined execution of both modified elephant herding algorithm (MEHA) and random forest (RF) algorithm, and hence the technique is named as MEHRFA. The purpose of the proposed control technique ensures the LVRT capability in the DFIG-based WECS at voltage drop and fault conditions. Here, MEHA approach is used as offline manner to identify the ideal solutions from the available searching space and creates the training dataset. In the MEHA technique, multiple parameters are considered which are related to LVRT such as, voltage, real and reactive powers and current. Utilizing these parameters, the objective function is characterized and solved by MEHA method. In light of the accomplished dataset, the RF performs and predicts the best possible control signals for machine-side converter and grid-side converter. In this manner, the LVRT capability of DFIG system and power quality issues has been enhanced with the assistance of proposed technique. The proposed procedure is implemented in MATLAB/Simulink working platform, and the exhibition is assessed by utilizing the comparison analysis with existing techniques. Keywords WECS LVDT DFIG Modified elephant herding algorithm Random forest algorithm MEHFRA List of symbol ps Qs Lm xs Rs , Rr Ls, Lr Vds ; Vqs ; Vdr ; Vqr Ids ; Iqs ; Idr ; Iqr
gds ; gqs ; gdr ; gqr Active power of stator Reactive power of stator Main inductance Synchronous speed Resistance of the stator and rotor windings Inductance of the stator and rotor windings The component of d and q on space vectors on stator and rotor voltages The component of d and q on space vectors on stator and rotor currents
Communicated by V. Loia. & G. Manohar [email protected] 1
Department of Electrical Engineering, CVR College of Engineering, Hyderabad, Telangana, India
2
Department of Electrical Engineering, JNTUH, Hyderabad, Telangana, India
xr ucðtrÞ tr T ðtrÞ
ðtrÞ
Ca ; Ca;pz Xa a b
The component of d and q on space vectors on stator and rotor flux linkage Rotor speed Specimen of out-of-bag trail to peculiar tree Tree number Total number of tree Predicted classes for each trail specimen Sample value Many specimen of trail per leave at tree Many samples per tree at forest
1 Introduction These days, the developing interest of electricity is expanded step by step because of the persistent utilization of electric power by the overall organization. In order to satisfy these growing needs of electricity, electric utilities and end clients of electric power are getting expanded (Bektache and Bo
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